Double-throw latch-bolt.



R. SCHOELL.

DOUBLE THROW LATCH BOLT.

APPLICATION FILED APR. 22. 1916.

1 N VE N T OR A tlmneyJ UNITED STATES PATENT orrrcE.

ItEINfiOLD SGHOELL, or STAMFORD, CONNECTICUT, AssIGNon o THE YALE & TowNE MANUFACTURING COMPANY, qr STAMFORD, CONNECTICUT.

no BLE-THnow LA oH-BoLT.

To all whom it may concern:

Be it known that I, REINHOLD SCHOELL a citizen of the United States, and a resident of Stamford, in the county of Fairfield will enable others skilled in the art to which,

it appertains to make and use the same.

My invention relates to improvements inlatches and particularly latches having double throw bolts, the object being to provide improved means for holding the bolt in its single throw position, which means are released to permit of the'full throw of the bolt, by the inward movement of the bolt during the closing movement of the door.

A further object'is to provide improved means for dead-locking the bolt in its double throw position, and also means for locking .the deadlocking slide against movement independently of the bolt when the latter is in its single throw position. v

With these objects in view my invention consists in the details-of construction as will be more fully explained and pointed out in theclaims. In the accompanying drawings, Figure 1 1s plate being removed, and the bolt projected to double throw position and "deadlocked. Fig. 2 is a view showing the position of the latch bolt projected to its first throwv position. Fig. 3 is a view in'section through Fig. 2, showing the easy latching bevel of the bolt. F ig.'4= isa View similar to Fig. 2, showing the bolt retracted. Figs. 5 and 5 are views of the release lever, and Figs: 6 and 6 are viewsof the deadlocking slide.

- The improvement is shown in connection with a mortise lock or latch, the bolt of which is adapted to be actuated by a key and also by knobs, but I would have it understood that I do not confine myself to the details of the mechanism shown except the bolt and the parts which coact therewith to Y produce the results that will be described.

- The lever 7 is pivoted to the lock casing and is normally held by a spring 7, in po sition to be engaged by the cam 8 actuated by the knob spindle 9, and also by the cam of a pin tumbler look not shown. Thelever absolutely to its full or second throw. The lever 19 is 'yieldingly forced toward the bolt by the a view partly in section and partly in elevation of my improved latch, the cover Specification of Letterslatentp P t t d J 1' 13, 191 Application filed April 22,- 1916. Serial, No. 92,903. I

latch lever 7 rests in front of the cross is normally projected and permit the latter to be retracted. I

The bolt 15 is provided with a. projection 17 in the shape of a hook which is adapted to be engaged by the hook 18 at the forward end of release lever 19. The two hooks" 17 and 18 are so located that when they are in stands projected at its first throw, and this engagement of the two hooks takes place upon the releasing of the bolt after it ha been withdrawn either by knobs or key, and prevents the bolt-from jumping sprlng 20, and when the hook 18 is in engagement with the-hook 17 on the'bolt 15, and the bolt is forced inwardly as in Fig.

5, the curved front edge-'18 of the hook 18 other than the slight frictional contact due to the weight of lever 19 and the pressure exerted against the latter by the spring 20.

With the construction thus far described, 1t will be seen that ifthe bolt be pushed inwardly, the hookonreleasing lever 19 will .ride on the top surface thereof and as the bolt moves outwardly the hook 18 on lever 19 will engage hook 17 on the bolt and prevent the latter from moving bevondits single throw, hence in order to.1'::rmit of the full or double throw of the bolt automatic shown detached in Figs. 6 and 6% and comprovided for disconnecting prises a fiat plate 21 having a head 21 to which the tail piece 22 is secured. These parts, which will be hereinafter referred to as he deadlocking slide, are' nounted in the' 110.

This means is as to release the bolt, when I3 at the rear end of the tail 14 of the rides up on the curved rear end 15 -of the\ bolt without meeting with. any resistance,-

75 engagement,- as' in Fig. 2 the latch bolt lock case at one side of the bolt as shown in Figs. 1 and 3, withthe part 21 thereof in contact with the sideface of'the bolt and passing through the front of the look. This part .or plate 21 is wider than the bolt so as to prevent it from entering the bolt openformthe shoulder 24 shown in Fig. 5 This cut away portion of the lever 19" normally rests on the head 21 of the deadlocking slide with its shoulder 24 in the path of movement of said. head, and blocks any independent rearward movement of the deadlooking slide. If however the bolt be pushed or pulled inwardly, the inward movement thereof elevates, as previously described, the releasing lever 19 and carries the shoulder 24 thereof out of the path of movement of the head 21*. [If the bolt is retracted and then released when the door is open, the hook on'the lever 19 will drop and engage the hook 17 on the bolt when the latter reaches its first or single throw position and thus absolutely prevent the bolt from being moved its full or double throw while the door is open. If the door be closed, the contact of the bevel of the bolt with the keeper forces the bolt and deadlocking slide reara hook 17 on the bolt.

wardly and when the door reaches its closed position the bolt is free to shoot into the bolt opening. There is no opening in the keeper for the deadlocking slide, hence when the door is closed the latter is held retracted, and when in such position its head 21 rests under the lever 19 in rear of the shoulder 24 and prevents said lever from dropping to a positionwhere its hook 18 can engage the This leaves the bolt free to be projected its full or double throw as shown in Fig. 1 and when in this position is deadlocked by the lever 11.

When the bolt is in its first or single throw position as shown in Fig. 2, the front end of lever 11 rests against the underside of the bolt, and is held thereagainst by its spring 25. As the bolt moves from its normal position, Fig. 2, to its double throw position, Fig. 1, its rear end passes the front end of deadlocking lever and thuspermits the latter to move up into the path of movement of the "bolt and deadlock the'same.

The bolt when double thrown may beretracted by the knobs or key mechanism act-- ing onthe latch lever 7. As this lever; is moved to retract the bolt the pin 10 thereon engages the rear end of deadlocking lever 11 and moves the latter in a direction to carry its free end out of the path of movement of the bolt, thus permitting the confrom moving outwardly beyond its first throw position. If the bolt should be pushed inwardly while the door is open and then be released, it would, if the deadlocking slide were held against outward movement, be projected its full or double throw and be deadlocked by the lever 11, but upon the release of the deadlocking slide the head 21" in its outward movement will engage the upturned end of the lever 11 and move it downwardly and out of the path of the bolt thus leaving the latter free to be drawn back to first throw position by pressure of the finger against the .same or by manipulating the knob or key mechanism.

The deadlocking slide cannot be pushed in to release the bolt when the door is open, except when pushed back by the bolt, hence the bolt cannot be deadlocked when the door is open except by pushing in the bolt and then releasing the bolt and holding the deadlocking slide in its retracted position until the bolt has beenfullyprojected, and if this should occur, the deadlock can be removed by manipulating either the key or the knob.

It is evident that many slight changes might be resorted to in the relative arrangements of partsshown and described without departing from the spirit and scope of my invention. Hence I would have it.understood "that I do not wish to restrict myself to the exact construction and arrangement of parts shown and described, but,

Having fully described my invention what 1 claim as new and desire to secure by Letters-Patent, is

1. In a lock, the combination of a double throw bolt, aspring for projecting the same, a lever having means to engage a shoulder on the bolt for holding the latter in its partly projecting position and a slide actuated by contact with the strike plate of the lock for holding the lever out of contact with the shoulder on the bolt when the latter is fully projected.

2. In a lock, the combination of a double throw bolt, a spring for projecting the same, a lever having means to engage a shoulder on the bolt for holding the latter in its partly projected position, the said lever also having a second shoulder, and a slide actuated by contact with the strike plate or keeper for holding the lever out of contact with the bolt when the latter is fully projected, the said slide being restrained against rearward sliding movement when the bolt is partly projected, by its engagement with the second shoulder on the lever:

3. In a lock, the combination of a spring actuated bolt, a pivoted lever having a hook engagement with the bolt for holding same in its partly projected position, the construction being such that the inward movement of the bolt elevates the lever and disconnects it from the bolt, and a slide movable rearwardly with the bolt and adapted to engage the lever and hold it out of the path of movement of the bolt thus permitting the latter to move to double throw position.

4. In a lock, the combination of a double throw spring actuated bolt, spring actuated means for holding the bolt in its partly projected' position, and .a slide movable rearwardly with the bolt and adapted to en- I gage the spring actuated holding'means and prevent its rengagement with the bolt during the forward movement of the latter.

5. In a lock, the combination with a double throw spring actuated bolt, means for holding the bolt in its partly projected position, means to engage said holding means after the latter has been disconnected from theebolt and hold the same out of the path of movement of the bolt so as to permit the latter to be fully projected, and a lever for deadlocking the bolt when fully projected the said deadlocking lever being bolt when the latter is in its single throwiposition, and a slide adapted when the door is open and the bolt fully projected to engage and hold said deadlocking lever out of the path of the bolt.

7. In a lock, the combination with a spring actuated bolt having a hook shaped projection at its inner end, a spring actuated lever having a hook to engage the hook on the bolt, a deadlocking slide normally held against rearward movement by a shoulder on the spring actuated lever, and adapted when moved rearwardly by and with the bolt to engage said lever and hold its hook out of the path of movement of the hook on the bolt, and a lever for deadlocking the bolt when the latter is fully projected.

In testimony whereof, I have signed this specification in the presence of two subscribing witnesses.

'REINHOLD SOHOELL. I Witnesses:

Mrs. S. BALKHAM, CHARLES A. BERRY. I 

